Question

I am trying to extract character value from UTF-8 format. Suppose I have two characters, and I extract 5 bits from first character => 10111 and 6 bits from another character => 010000

so

ch1 = 10111;
ch2 = 010000;

how would I combine them to form 10111010000 and output its hex as 0x5d0? Do I need to shift or is there an easier way to do this, because checking the documentation write appear to be able to read characters sequentially, is there a similar function like this? Also, it appears I would need a char buffer since 10111010000 is 11 bits long. Does any know how to go about this?

Answer 1

You need to use shifting, plus the | or |= operator.

unsigned int ch3 = (ch1 << 6) | ch2;
// ch3 = 0000010111010000

I’m assuming here that an unsigned int is 16 bits. Your mileage may vary.